I wasn't sure about these services...
I wasn't sure about these services but I went for the free credit and used it in the 25 YouTube Subs. You can track the order status which said "In Progress" for a couple of days and my YouTube subs were going up. I have then used the following service again this week, by paying for 50 YouTube Subs which again seemed to work as my total subs leveled off at the correct amount (Allowing for real people subs average as well in my calculations)
You have to manually request the free credit which at first they said it wasn't available at present. I sent another email saying can you add the credit when it is available as want to try the service before using my own money. I got the credit added after they said it was in my account now and email replys are with 24hrs. I will place another order in September as so far they have delivered. If things change then I will obviously edit the review, but so far I am pleased with SocialPlus and will continue to use them to help my YouTube Channel to grow.